[CA] [CA11] replacing C80 with two E80's Seatalk connection

[Chuck - Raymarine - Moderator]

Andy,

When splicing the SeaTalk cable which had been connected to the C-Series display to the SeaTalk/Alarm Cable, it is recommended that only two leads be connected unless the devices on the SeaTalk bus are limited to the MFD and GPS sensor. In such cases,
- the yellow lead of the SeaTalk/Alarm Cable will be interfaced to the yellow lead of the SeaTalk Cable
- the black lead of the SeaTalk/Alarm Cable will be interfaced to the shield lead of the SeaTalk Cable
- the red leads of the SeaTalk/Alarm Cable and SeaTalk Cable will not be used. These leads should be insulated to prevent shorting.

Should you review the E-Series Networked Display Installation Manual (link provided within my last response, you will find that the SeaTalk/Alarm Cable supplied with the E-Series Classic MFDs features Alarm leads, as per the cable's name. If desired, the corresponding leads of the SeaTalk/Alarm Cable may be interfaced to a piezoelectric horn to provide an auxiliary alarm (ex. in berthing area, etc.) or an alarm having a frequency which is within the audible frequency capabilities of hearing impaired operator.